let's keep medicare... and social security strong for generations to come. provide safe, affordable housing within the city, supporting an organization that's helping kids find jobs and stay in school, or financing the expansion of a local company that's creating healthier workplaces, what's important to the people of the bay area is important to us. and we're proud to work with all those >> stahl: now, an update on our story from a year ago called "the pledge," a look at the power wielded by lobbyist and anti-tax crusader grover norquist. nearly every republican in congress has signed the promise that they will never, under any circumstances, vote to raise taxes on anyone. here's what norquist, the pledge's originator and chief enforcer, told steve kroft. >> grover norquist: republicans who vote for a tax increase are rat heads in a coke bottle. they damage the brand for everyone else. >> stahl: now, as the country approaches the fiscal cliff, a handful of republicans have defied norquist and say they'll consider raising new revues, and 12 newly elected rep